SearchQuerySet filter on a MultiValueField containing Dates

[Joseph Wayodi]

Hello,

I'm trying to do a SearchQuerySet filter on a MultiValueField that
contains Dates, and it looks like the only field lookup types that
work are "contains" and "exact". I'd like to be able to use "gt",
"gte", "lt", "lte", "in", and "range". Is this supported at all? Or is
it not implemented in the backend (Xapian) that I'm using?

I'm using Haystack (version 2.0.0-beta from GitHub) with the Xapian
backend (xapian-haystack version 2.0.0 from GitHub).

My code is as below:

models.py
---------

class Movie(models.Model):
year = models.PositiveIntegerField(blank=True, null=True,)
director = models.CharField(max_length=128, blank=True, )
writer = models.CharField(max_length=128, blank=True, )
country = models.CharField(max_length=32, blank=True, )
actors = models.TextField( blank=True, )
plot = models.TextField(blank=True, )
runtime = models.CharField(max_length=128, blank=True, )

class Show(models.Model):
movie = models.ForeignKey('Movie', related_name='shows')
starts = models.DateField(db_index=True,)

search_indexes.py
-----------------

class MovieIndex(indexes.Indexable):
starts = indexes.MultiValueField(null=True,)

def prepare_starts(self, obj):
start_dates = [show.starts for show in obj.shows.all()]
return start_dates

views.py
--------

sqs = SearchQuerySet().filter(django_ct='movies.movie',
starts=datetime.date(2012, 12, 15)) # works

sqs = SearchQuerySet().filter(django_ct='movies.movie',
starts__gt=datetime.date(2012, 12, 15)) # doesn't work
sqs = SearchQuerySet().filter(django_ct='movies.movie',
starts__gte=datetime.date(2012, 12, 15)) # doesn't work
sqs = SearchQuerySet().filter(django_ct='movies.movie',
starts__lt=datetime.date(2012, 12, 15)) # doesn't work
sqs = SearchQuerySet().filter(django_ct='movies.movie',
starts__lte=datetime.date(2012, 12, 15)) # doesn't work
sqs = SearchQuerySet().filter(django_ct='movies.movie',
starts__in=[datetime.date(2012, 12, 15), datetime.date(2012, 12, 17),
datetime.date(2012, 12, 19)]) # doesn't work
sqs = SearchQuerySet().filter(django_ct='movies.movie',
starts__range=[datetime.date(2012, 12, 15), datetime.date(2012, 12,
17)]) # doesn't work

Regards,

Joseph.